Fundamentals of Electrical Engineering Unit 2 – Steady State Analysis of Single Phase AC Circuits: AKTU previous year questions
44 AKTU questions from Unit 2 (Steady State Analysis of Single Phase AC Circuits) asked in 2022–2026, tagged by marks, year and topic. In short: about 26 marks of every paper come from this unit; the most asked topic is Resonance in AC Circuits (15 times); 41 questions came back in a later year. The latest ones are listed below; on the page you can filter them by 2-mark or long questions, topic and repeats.
Unit 2 previous year questions
- Define the expression for form factor and peak factor. (2 marks, 2026, AC Waveform Fundamentals)
- What is the condition for series resonance? What happens to the impedance of a series RLC circuit at resonance? (2 marks, 2026, Resonance in AC Circuits)
- A resistance of 75Ω, an inductance of 0.35H and a capacitance of 150μF are connected in series across a 230V, 50Hz supply. Calculate (i) the resultant current (ii) the phase angle between the resultant current and the supply voltage (iii) power factor of the circuit. (7 marks, 2026, Single Phase RLC Circuits)
- What is meant by bandwidth of a resonant circuit? Draw the resonance curve of a series RLC circuit and prove the bandwidth is ω₂ - ω₁ = R/L. (7 marks, 2026, Resonance in AC Circuits)
- Derive the relation between Phase Voltage & Line voltage for Star connected three phase supply system. A 3 phase, 400-volt supply is connected to a 3 phase star connected balanced load. The line current is 20 amps and the power consumed by the load is 12 KW. Calculate the phase impedance of the load, phase current and power factor. (7 marks, 2026, Three Phase Balanced Circuits)
- Define the RMS value and write the formula. (2 marks, 2025, AC Waveform Fundamentals)
- A resistance of 15Ω, choke coil of 0.05 H and the capacitor of 0.03 F are connected in series. Find the impedance of the circuit if frequency is 50 Hz. (2 marks, 2025, Single Phase RLC Circuits)
- What is the average power in a pure capacitive circuit? (2 marks, 2025, AC Power and Power Factor)
- Derive that average power consumed by a pure inductor is zero. (2 marks, 2025, AC Power and Power Factor)
- Derive the equation for resonant frequency in the case of a series RLC circuit draw the phasor diagram of resultant Voltage and Current in circuit in resonant condition. (7 marks, 2025, Resonance in AC Circuits)
- What is resonance curve and prove the bandwidth of resonant frequency is f₂ - f₁ = R/2πL. (7 marks, 2025, Resonance in AC Circuits)
- Derive series resonance frequency in R-L-C circuit. A series R-L-C circuit has R=20 Ω, L=0.1H and C=0.09F. Determine (i) Resonant frequency (ii) Q factor of the circuit at resonance. (iii) Bandwidth (7 marks, 2025, Resonance in AC Circuits)
Most asked Unit 2 topics
- Resonance in AC Circuits – asked 15 times
- AC Power and Power Factor – asked 11 times
- AC Waveform Fundamentals – asked 7 times
Unit 2 question pattern
- 2-mark questions: 17 asked in 2022–2026
- 7-mark questions: 22 asked in 2022–2026
- 10-mark questions: 5 asked in 2022–2026
- About 26 marks from Unit 2 in every paper
- 41 questions were asked again in a later year
Unit 2 questions year by year
- 2026: 5 Unit 2 questions asked (25 marks across that year's papers)
- 2025: 11 Unit 2 questions asked (57 marks across that year's papers)
- 2024: 9 Unit 2 questions asked (48 marks across that year's papers)
- 2023: 10 Unit 2 questions asked (50 marks across that year's papers)
- 2022: 9 Unit 2 questions asked (58 marks across that year's papers)